Here are all the options parts for the Xray NT1 2018 and olders
Reference 06335530-O
Brand: XRAY
DRIVE FLANGE WITH ONE-WAY BEARING - ALU 7075 T6 - ORANGE - 335530-O
Reference 06335540
Brand: XRAY
COMPOSITE 2-SPEED GEAR BOX SHOE - SET - 335540
Reference 06335541
Brand: XRAY
COMPOSITE SMALL 2-SPEED GEAR BOX SHOE - SET - 335541
Reference 06335571
Brand: XRAY
ADAPTER SMALL 2-SPEED - 335571
Reference 06335583
Brand: XRAY
SPRING FOR SMALL GEAR BOX - MEDIUM-HARD (2) - 335583
Reference 06335590
Brand: XRAY
HEX SCREW SFH M3x6 - GRINDED (3) - 335590
Reference 06335655
Brand: XRAY
GRAPHITE 2-SPEED GEAR 55T (2nd) - 335655
Reference 06335657
Brand: XRAY
GRAPHITE 2-SPEED GEAR 57T (1st) - 335657
Reference 06335658
Brand: XRAY
GRAPHITE 2-SPEED GEAR 58T (1st) - 335658
Reference 06335800-O
Brand: XRAY
COMPOSITE BELT PULLEY COVER SET - GRAPHITE - 335800-O
Reference 06335885-O
Brand: XRAY
LOW FRICTION COMPOSITE BELT PULLEY 25T - MID-SIDE - GRAPHITE - 335885
Reference 06335886-O
Brand: XRAY
LOW FRICTION COMPOSITE BELT PULLEY 26T - MID-SIDE - GRAPHITE - 335886